Description Costume jewelry. The heart pendant measures 30mmx20mm. * The necklace chain is 46cm long. * These dark heart pendant have different colors(blue, green, yellow), but all of them Glow green light in the dark. * These dark products glow out light only after they absorbed enough light. So please make sure that you have put these Glow in the dark products under the light to absorb light before you enjoy their light in the dark. The longer they exposed, the stronger they glow. * UV-light works great with glow in the dark items. Also the pendant be highly glowing, you only need to put under normal LED or sunlight.

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